Valve for water-gades



(No Model.)

0. B. DUNTON.

VALVE FOR WATER GAGES.

No. 383,448. Patented May 29, 1888.

ALSEZ WrNEssEs AT'rrs- N. PETERS Phvlwulhnuraphnr, Wnhinghm, II C PATENT rrics.

CLARK B. nnnron, or PORTLAND, lllIA'INE.

VALVE FOIQ WATER GAGES.

QFECTFTCATIQN forr'fii'ng part of Letters Patent No. 3831448, dated May 29, 1888.

Application filed February 3, 1888. Serial No. 262,817. (No model.)

To all whom it may concern:

Be it known that I, CLARK B. DUNTON', of Portland, in the county of Cumberland, State of Maine, have invented a certain new and useful Improvement in Valves, of which the followingisa description sufficiently full,clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which-- Figure 1 is a side elevation of the auxiliary valve detached; Fig. 2, a vertical transverse section of the same; and Fig. 3 a side elevation of a valve embodying my improvement, a portion of the boiler and valve being shown in vertical longitudinal section.

Like letters and figures of reference indicate corresponding parts in the different figures of the drawings.

My invention relates more especially to that class of valves which are used in connection with the water-gages of steam-boilers; and it consists in certain novel features, as hereinafter fully set forth and claimed, the object being to producea more effective device of this character than is now in ordinary use.

The nature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation.

In the drawings, A represents the body of the valve; B, the gage or glass tube; 0, the nut for packing the tube; 0, the perforated cap of said nut, and D the boiler, these parts being all of the ordinary form and construction.

The auxiliary valve H (see Figs. 1 and 2) consists of a metallic tube, x, having a head, 2, provided with an annular flange, 11, adapted to rest upon the upper end of the gasket-nipple m of the valve A and sustain the valve H in a pendent position therein. The head a of the valve H is provided with a socket, f, 45

adapted to receive one end of the glass tube B, as shown in Figs. 2 and 3,which rests upon an inwardly-projecting annular flange, an opening, i, for the passage of water into the glass tube B being left between the tube 00 and socketf. A valve proper, (1, consisting of a cylindrical metallic block, is fitted to work loosely in the tube as, said valve being adapted to be seated against the lower side of the annular flange y, and prevented from escaping from the tube a by a laterally-arranged pin,

i, in the lower portion of said tube. Holes 1' are provided in the tube 00, near its head 2, to permit the passage of water from the gasketnipple m into said tube, and thence through the opening t into the glass tube B.

In the use of my improvementthe auxiliary valve H is disposed in the nipple m with its flange o resting upon the upper end of said nipple, as described. The glass tube B is then adjusted in the socketf, and the whole secured in position in the ordinary manner by turning the nut 0 onto its nipplem, the elastic packing-ring is ordinarily employed pressing against the flange v of the valve H and securely holding it in position. The water from the valve A. readily passes from the nipple 1%, through the holes r, into the tube as, around the valve proper, d, and thence through the opening 15 into the glass B.

It will be obvious that while the pressure of the water on all sides of the valve proper, d, is equal, it will be balanced and the valve H remain open; but should the glass gagetube B become accidentally broken, thus removing the pressure from the top of the valve d, the pressure beneath said valve will instantly cause it to rise and rest on its seat thereby automatically closing the duct t, preventing the water from escaping, and enabling the broken tube to be readily replaced.

Havingthus explained my invention, what I claim is- 1. The combi nation ofa valve provided with a screwthreaded nipple, a nut thereon pro vided with a perforated cap, a packing-ring between said nut and nipple, a. gage-tube pass ing through said cap, and an auxiliary de- CLARK 1;. Demon.

Witnesses:

BENJ. THOMPSON, G. R. DUFFETT. 

